Taillight for a vehicle



FIG. 1 is a front view of a taillight for a vehicle according to the design;

FIG. 2 is a left, bottom perspective view thereof;

FIG. 3 is a right, top perspective view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear view thereof. 

CLAIM The ornamental design for a taillight for a vehicle, as shown and described. 